Yellow patches in winter barley

[upnortheast]

Question from a dairy farmer for you corn men
WB drilled 10th sept after plough & combination into cracking seed bed
Very quick & even germination. Reasonable amount of rain since but ground still "sound"
Last couple of weeks sporadic patches of yellow appearing. Probably worse at ends.
What do you think ?

 

[DRC]

chemical overlap , presuming it’s had a pre em .

 

[jessop123]

that was my first thought. or dodgy nozzle over-dosing?

 

[Neddy flanders]

previous crop?

 

[upnortheast]

previous crop?

2nd year WB after grass

 

[Bob]

Got some identical I was thinking manganese It looks be improving now

 

[benny6910]

Would there be any chance of it being insect damage with it being 2nd crop after grass? I’ve just spoken to a friend today that is getting damage in a barley crop after grass.

 

[Flat 10]

Would there be any chance of it being insect damage with it being 2nd crop after grass? I’ve just spoken to a friend today that is getting damage in a barley crop after grass.

can you pull those ones up easily?

 

[5020man]

Wireworm ?.

 

[DaveGrohl]

Need more photos really. What is the spread of these plants? You say worse on ends, which might be overdosing effect of herbicide but impossible to diagnose from that one photo. Presume it's been sprayed? Do those yellow leaves have green fresh leaf coming through to replace the yellow?

 

[eagleye]

compaction on headlands? BYDV more likely in small circles.

 

[Adeptandy]

compaction on headlands? BYDV more likely in small circles.

I’d have said that until last year, patches were irregular shaped here, first time I’d seen byvd

 

[upnortheast]

Thanks for the replies.
No sign of wireworm damage.
New leaves look clean, just the bottom leaf yellow
Yes had pre em , the yellow bits dont match sprayer overlap or dodgy nozzles

It`s heavy land, was very dry when drilled so was rolled.
Last couple of years when there has been moisture about at drilling we did not roll.
So I`m thinking compaction most likely cause

 

[ollie989898]

If it is wireworm, you will be able to pull up leaves individually as they will have been chewed off. You may even find an offending wireworm.

It's not pre-em damage in my opinion.

Get this sometimes in barley just does a bit yellow because it can, particularly where it has been growing on but been hit by a bit of cold and wet. It is normally transient but you may find manganese and a bit of something like yaras magphos K will bring it on. Used to do some but not always. If you are going to do a BYDV pass, you can put this in with the pyrethroid.

 

[Devon Gurfallo]

Could be Frit fly

 

[glasshouse]

Bydv

 

[jclarkson]

Ours came out a bit like this, agronomist put it down to pre em, grown past it now.

 

[Chae1]

Ours came out a bit like this, agronomist put it down to pre em, grown past it now.

When are we going to be able to watch the new series?

 

[robbie]

Could it just be barley being barley!!!
Our early drilled stuff raced away then had them few cold days and nights combined with using up most of the available N it has now yellowed a bit in places especially on over drills.

 

[upnortheast]

I know they say there is no need for N on WB in the autumn but just as an experiment I`ve just been & spread a bucket of N on a yellow bit to see what happens